132.
    发明专利
    未知

    公开(公告)号:DE50108700D1

    公开(公告)日:2006-04-06

    申请号:DE50108700

    申请日:2001-10-11

    Applicant: BASF AG

    Abstract: A process is provided for improving the color number of polyhydric alcohols, especially trimethylolpropane, by catalytic hydrogenation, the polyhydric alcohol used in the hydrogenation having been purified by distillation following its preparation, wherein the hydrogenation is carried out in the presence of a macroporous supported heterogeneous catalyst containing, as the active metal, at least one metal of subgroups VII to X of the Periodic Table.

    133.
    发明专利
    未知

    公开(公告)号:BRPI0408384A

    公开(公告)日:2006-03-21

    申请号:BRPI0408384

    申请日:2004-03-20

    Applicant: BASF AG

    Abstract: A process for hydrogenating an organic compound which has at least one carbonyl group, in which the organic compound is hydrogenated in the presence of a shaped article which contains (i) an oxidic material comprising copper oxide, aluminum oxide and lanthanum oxide, and (ii) powdered metallic copper, copper flakes, powdered cement, graphite or a mixture thereof, is provided.

    135.
    发明专利
    未知

    公开(公告)号:DE50300824D1

    公开(公告)日:2005-08-25

    申请号:DE50300824

    申请日:2003-02-28

    Applicant: BASF AG

    Abstract: Crude water-containing tetrahydrofuran is purified by passing the crude tetrahydrofuran through three distillation columns, withdrawing water from the bottom of the first column, recycling water-containing tetrahydrofuran from the top of the second column into the first column, passing a sidestream of the first column into the second column, recycling the bottom product of the third column into the first column, and withdrawing a distillate at the top of the first column. Additionally, a sidestream of the second column is passed into the third column and the purified tetrahydrofuran is recovered as the top product of the third column.

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